Tracked live by the FAA, but its flight plan was first seen after takeoff, so we don't know the scheduled time and can't say whether it's late.

UNITED · FLIGHT UA 127 LANDED 7:10 PM ET, ~2 MIN LATE · SCHEDULED TIME UNKNOWN

UA 127 · FCO → IAD

took off 3:38 PM CEST · landed 7:10 PM ET (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 12h after departure

Odds over time

Arrive at IAD more than 15 minutes late?
9% chance · ±0 pts +1 pt · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
WEATHER FORECASTS LIVE IN THE AIR 0% 5% 10% 15% 20% 16h 12h 6h Departs Lands